# CVE-2026-54612: Vvveb CMS arbitrary file write and PHP execution

Source: https://junglewise.ai/threats/cve-2026-54612-vvveb-cms-arbitrary-file-write-and-php-execution  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-17. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-54612 · Severity: high · CVSS 8.8 · Published 2026-09-17

Vvveb is a page builder CMS used to create websites, blogs, and ecommerce stores. A flaw in the global elements save function allows authenticated editors to write arbitrary PHP files to web-accessible directories, leading to persistent webshell placement and complete compromise of application confidentiality, integrity, and availability.

Technologies: [Vvveb](https://junglewise.ai/threats/technologies/vvveb). Vendors: [Vvveb](https://junglewise.ai/threats/vendors/vvveb).

## Quick answers

**Is CVE-2026-54612 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-54612 being exploited in the wild.

**How severe is CVE-2026-54612?** High severity, with a CVSS score of 8.8, published 17 September 2026.

**Which products and versions are affected?** Vvveb 1.0.0 through 1.0.8.4.

**Is there a fix for CVE-2026-54612?** A patch was published on 2026-06-07: Version 1.0.8.5 released with sanitization fix Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-54612 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-54612?** Check whether you run Vvveb at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability exists in saveGlobalElements() within admin/controller/editor/global-trait.php, which concatenates user-controlled file paths from the data-v-save-global parameter directly to the theme directory without proper sanitization before passing to loadHTMLFile() and file_put_contents(). An authenticated user with the default Editor role and editor/* permission can submit crafted HTML to module=editor/editor&action=save to traverse outside the theme directory and overwrite existing writable PHP files. If web-accessible, the attacker can leverage the shipped public/vadmin/index.php entrypoint to execute editor-controlled PHP code. The fix in version 1.0.8.5 adds path sanitization and removes the editor/* permission for the Editor role.

## Affected products

- Vvveb Vvveb 1.0.0 through 1.0.8.4

## Timeline

- 2026-09-17: disclosed
- 2026-06-07: patched: Version 1.0.8.5 released with sanitization fix

## References

- [https://github.com/givanz/Vvveb/commit/c8fef41ad8651d348050c513451755ab8882b97e](https://github.com/givanz/Vvveb/commit/c8fef41ad8651d348050c513451755ab8882b97e)
- [https://github.com/givanz/Vvveb/releases/tag/1.0.8.5](https://github.com/givanz/Vvveb/releases/tag/1.0.8.5)

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